Fixed some checkstyle issues (using final wherever possible, hence a few changes...)
Introduced constants and rename final static method in upper case (was inconsistent).
Also there were a few inconsistencies in the use of { on the same line as for or if.
Re-ordered private/static/final keywords to follow java standard (e.g. private static final...)
I hope this is ok.

bug 18: propget on deleted binary files now works, even if it is not used.
Now throwing error when message is in standard out AND error stream. Previous tests had shown the error was on the error stream, but now it is shown on the standard out.

bug 18: fixed issue with calling getCurrentLine() instead of nextline().
tested: when network fails, bubbles up an IOException such as "svn: can't write to connection: An existing connection was forcibly closed by the remote host".
needs to be tested on server that prevents DoS, but the IOException needs to be handled to try and continue and persist any information that was acquired

* Added some serial ids to serializable classes.
* added utility methods to go from [relative, absolute, url] to [relative, absolute, url]
* deprecated a few files
* Bug 1: added test suite to make sure they work as intended. need to test in the field, but behaviour is now easy to track.